package com.cy.pj.sys.service.impl;

import com.cy.pj.common.exception.ServiceException;
import com.cy.pj.common.vo.Node;
import com.cy.pj.sys.dao.SysMenuDao;
import com.cy.pj.sys.entity.SysMenu;
import com.cy.pj.sys.service.SysMenuService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.thymeleaf.util.StringUtils;

import java.util.List;
import java.util.Map;

@Service
public class SysMenuServiceimpl implements SysMenuService {

    @Autowired
    private SysMenuDao sysMenuDao;

    @Override
    public List<Map<String, Object>> findObjects() {
        List<Map<String, Object>> list =
                sysMenuDao.findObjects();
        if(list==null|| list.size()==0)
            throw new ServiceException("没有对应的菜单信息");
        return list;
    }

    @Override
    public int deleteObject(Integer id) {
        ////1.验证数据的合法性
        if(id==null||id<=0)
            throw new IllegalArgumentException("请先选择");
        //2.基于 id 进行子元素查询
        int count=sysMenuDao.getChildCount(id);
        //3.删除角色,菜单关系数据
        if (count>0)
            throw new ServiceException("请先删除子菜单");
        //4.删除菜单元素
        int rows=sysMenuDao.deleteObject(id);
        if (rows==0)
            throw new ServiceException("此菜单可能已经不存在");
        return rows;
    }

    @Override
    public List<Node> findZtreeMenuNodes() {
        return sysMenuDao.findZtreeMenuNodes();
    }

    @Override
    public int insertObject(SysMenu entity) {
        //1.合法验证
        if (entity==null)
            throw new IllegalArgumentException("保存对象不能为空");
        if (StringUtils.isEmpty(entity.getName()))
            throw new IllegalArgumentException("菜单名不能为空");
        //2.保存数据
        return sysMenuDao.insertObject(entity);
    }

    @Override
    public int updateOject(SysMenu entity) {
        if(entity==null)
            throw new ServiceException("保存不能为空！");
        if(StringUtils.isEmpty(entity.getName()))
            throw new ServiceException("菜单名不能为空");
        int rows = sysMenuDao.updateObject(entity);
        if(rows==0)
            throw new ServiceException("记录可能已经不存在");
        return rows;
    }


}
